Private File Sharding

[appcypher]

Summary

This PR implements sharding of file content; breaking the content up and storing them in the HAMT if they are larger than certain threshold, storing them inline otherwise.

This PR implements the following features

• Private file sharding
• Stream shards
• Wasm APIs
• Tests

Test plan (required)

• Testing

  rs-wnfs test --all

Closing issues

Fixes #80

[codecov]

Codecov Report

Merging #88 (fd1412a) into main (80dbe82) will increase coverage by 1.84%.
The diff coverage is 82.24%.

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
+ Coverage   66.05%   67.89%   +1.84%     
==========================================
  Files          26       26              
  Lines        1903     2003     +100     
  Branches      486      482       -4     
==========================================
+ Hits         1257     1360     +103     
- Misses        248      253       +5     
+ Partials      398      390       -8     

Impacted Files	Coverage Δ
wnfs/src/common/error.rs	0.00% <ø> (ø)
wnfs/src/common/metadata.rs	67.56% <ø> (ø)
wnfs/src/common/utils.rs	70.00% <ø> (ø)
wnfs/src/private/forest.rs	59.15% <ø> (+2.81%)	⬆️
wnfs/src/private/node.rs	68.91% <ø> (ø)
wnfs/src/private/previous.rs	72.41% <ø> (+1.14%)	⬆️
wnfs/src/public/node.rs	54.79% <ø> (-1.37%)	⬇️
wnfs/src/private/directory.rs	75.42% <78.94%> (+2.92%)	⬆️
wnfs/src/private/file.rs	79.16% <82.95%> (+10.59%)	⬆️
... and 12 more

[appcypher]

Just made our tests slower; enabled Safari and Edge for the wasm-js-tests. We've been ignoring them for a while. I'm considering disabling Edge since we have Chrome tests.

[appcypher]

Made it faster switching to macos-latest. Still not as fast as I'd want so removing Edge tests is still on the table.

[matheus23]

Only small things except for the shard order thing :)

[matheus23]

Letsgooooo
One step closer to alpha!

[zeeshanlakhani]

minor comments left, great work.